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Bose Acoustic Wave music system Manual del usuario
Important Safety Instructions
18. Use Proper Power Sources – Plug the
product into a proper power source, as described
in the operating instructions or as marked on the
product.
19. Avoid Power Lines – Use extreme care when
installing an outside antenna system to keep from
touching power lines or circuits, as contact with
them may be fatal. Do not install external
antennas near overhead power lines or other
electric light or power circuits, nor where an
antenna can fall into such circuits or power lines.
20. Ground All Outdoor Antennas – If an
external antenna or cable system is connected to
this product, be sure the antenna or cable system
is grounded. This will provide some protection
against voltage surges and built-up static
charges.
Section 810 of the National Electrical Code ANSI/
NFPA No. 70 provides information with respect to
proper grounding of the mast and supporting
structure, grounding of the lead-in wire to an
antenna discharge unit, size of grounding
conductors, location of antenna-discharge unit,
connection to grounding electrodes, and
requirements for the ground electrode. Refer to
the antenna grounding illustration on this page.
2b

Antenna grounding

Example of antenna grounding as per National
Electrical Code, ANSI/NFPA 70.
Ground clamp
Electric service
equipment
Note to CATV system
installer
This reminder is provided to call the CATV system
installer's attention to Article 820-40 of the NEC (of
USA) that provides guidelines for proper ground-
ing. In particular, it specifies that the cable ground
shall be connected to the grounding system of the
building, as close to the point of cable entry as is
practical.
Antenna lead-in wire
Antenna discharge unit
(NEC Section 810-20)
Grounding conductors
(NEC Section 810-21)
Ground clamps
Power service grounding
electrode system
(NEC ART 250, Part H)